what's wrong with the Exchange Migration Tool

the release i saw require to access each outlook profil to run the migration, so you need to setup x profils...
also, and you need to have outlook on your computer (or vm computer).
imagine you have 100 exchanges'emails accounts with 5Go of data for each one...

it should be perfect if we would have just to enter/setup the emailS account and password, the exchange server ip/dns, having a pre-screen that list each account property before import (email size, event count, contact count)...

or entering a admin account of the domain, and migrate all the account of a domain (so don't need to enter each email, each password...).